#include <stdio.h>
#include <stdlib.h>
#include <string.h>



#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>


void error_handling(const char *message);


int main(int argc, char *argv[])
{
    int sock;

    struct sockaddr_in serv_addr;
    socklen_t clnt_addr_size;
    char msg[30];
    int str_len;

    if ( argc != 3) {
        printf("Usage: %s <IP> <port> \n", argv[0]);
        exit(1);
    }

    sock = socket(PF_INET, SOCK_STREAM, 0);
    if ( sock == -1) {
        error_handling("socket() error");
    }

    memset(&serv_addr, 0, sizeof( serv_addr) );
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = inet_addr(argv[1]);
    serv_addr.sin_port = htons(atoi(argv[2]));

    if ( connect(sock, (struct sockaddr_in *)&serv_addr, sizeof(serv_addr)) == -1) {
        error_handling("connect() error");
    }
    str_len = read( sock, &msg,sizeof(msg)  - 1);
    if ( str_len == -1) {
        error_handling("read() error");
    }

    printf("message from server: %s\n", msg);
    close(sock);

    return 0;
}


void error_handling(const char *msg)
{   
    perror("result:");
    fprintf(stdout, "%s", msg);
    exit(1);
}